http://www.technologyreview.com/Energy/21298/
Researchers at MIT used a virus to assemble two major components of a working microbattery.
"... The virus is made of proteins, which can be genetically modified to react with particular substances. In this case, it generated structured arrays of cobalt oxide nanowires on top of the solid electrolyte. Finally, the assembled electrodes were flipped over and pressed onto thin bands of platinum, which were joined to a copper contact in order to collect current from the device. ..."
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